Screening device.



F. S. CURTISI SCREENING DEVICE APPLICATION FILED IAN.9. 1917 g Pimm@ Da. E 19W.

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SCREENING DEVICE.

appneation mea January a, i917. serial no. 141,396.

To all Iwhom t may concern.

Be it known that I, FREDERICK STUART CURTIS, a citizen of. the United States, and resident of Lakewood; in the county of Cuyahoga and State of Ohio, have invented a new and useful Improvement in Screening g to be a full, clear, and exact description thereof. j

My invention relates to screening devices, and especially pertains to screening devices of the character in which a screening member is to be detachably connected with a frame for ,supporting such screening` member. j

ln screening devices of this character, it is desirable that the screening member, usually a sheet of screen cloth; be connected to its supporting frame in such a way that there will be no damage done to the meshes of the screening member when it is connected to, or disconnected from, the frame, or when the frame is expanded, or the like, to effect a stretching of the screen cloth. It is an object of my invention, therefore, to provide a screening device in which the possibility of injury to the fabric of the screening member, due to the connection of such meinber to, or disconnection of such member from, the frame, will' be reduced to a minimum. It is another object of mykinvention to provide a screening member for use in connection with an expansible frame or the like, which screening member will be olf such a nature that its fabric will not injured, especially at the points of connection of the same with the frame, when said screen frame I is expanded. It is a further object of my invention to provide a screening. member in which all wires or threads, parallel to the direction in which stretch is applied, are placed e ually in tension; so that the screening mem r is stretched to the same degree of tightness in all the parts of the screening surface, thereby to insure that all parts of the screening surface shall be in substantially the same plane, and preventing the appearance of pocketsorthe like therein.

it is another object of my invention to pro.- f vide a screening device of the above character by which it will lbe made'pos'sible to connect the screening member to, and dis- Y connect it from, the frame, with great ease and speed.

Specification of Letters .'tatent.

Patented Dee.D d, 19t?,

And other and further objects of the invention will appear from the following specification taken in conjunction with the appended claims.

A screening device, constructed in accordance withmy invention, is shown, by way of example, in the accompanying drawing, and described in the following speciication. It is to be understood, however, that the invention may be embodied in other forms, and that changes may be made in the-particular form which has been .described and Shown, without exceedingv the scope of the claims annexed hereto.

, In the drawing:

-Figure 1 is a plan of a screening device constructed in accordance with my invention, a portion of the-screening memberbev ing broken away, so as better to disclose the construction of the expansible supporting frame therefor;

Fig. 2 -is a section of the line 2 2 of Fig. j

Fig. 6 is a detail section, on an enlarged scale, showing a portion of the edge of the screening member.

Similar reference characters indicate corresponding parts throughout the specifica tion, and the several ligures of the accompanying drawing.

Referring now to the drawing, the screen vframe Vcomprises a pair of side bars 10,

which are in the form of angle irons, these angle irons being disposed so as to present outwardly extending webs 11. To the angle irons 10 are secured sockets 12 which are internally screw threaded to receive the threaded ends of transverse expansion bars 13. These bars have their threads running in opposite directions; so that the rotation 'of the bars 13 in one direction will cause the side bars 10 to be moved apart, while their rotation in theopposite direction will cause vthe side bars-t0 be brought together.

Connected between the side bars 10 are end bars 14 and 15. These bars, like the side bars 10, are formed of angle irons; but they are disposed with the webs extending inwardly. The end bars 14 and 15 are secured to the side bars 10 by means of brackets 18, the downwardly extending Webs 19 (Figs. 4 and 5) of which are riveted to the side bars. The horizontal portions of the brackets 18 are formed with elongated slots 20, through which pass rivets 21 secured in the end bars 14 and 15. The lower ends of the rivets 21 are secured in plates 22. It will be seen that this construction permits of the side bars 10 being moved toward and away from each other, by the expansion bars 13.

Upon the sup orting frame described above is mounte the screening member, which includes a sheet of screen cloth 23. Along each side of the screen cloth is secured a side reinforcing and attaching meinber 24. This attaching member consists of a metallic strip formed at its outer edge into a hook 25 adapted to fit over the edge of the web 11 of one of the cross bars 10. At its opposite edge the member 24 is also made hook-shaped, and is crimped, at 26, over the edge of the screen cloth. The edge of the screen cloth beneath the ortion 26 of the member 24 is crimped, at 2 ,over the ed e of an insertion strip 28 formed of a suitable fabric, such as cotton webbing, or the like, this strip being of sufcient width to extend between the screen cloth and the crimped portion of the member 24 when the screen cloth is reversed over this portion, as shown in Fig. 6.

In applying the screening member to the screen frame, the frame is first contracted, by operating the bars 13; and the hooks 25 of the side members 24 are then hooked over the flanges 11 of the side bars 10. vWhen the screening member has thus been put in place, the side members of the frame are,

expanded by means of the expansion bars 13. The result of thus expanding the frame is to stretch the cloth 23 tightly across the frame.

It will be noted that the members 24 are so constructed, arranged, and connected with the screen cloth 23, that no damage to the screen cloth, or disarran ement of the meshes thereof, can result rom the connection of the screening member to, or disconnection from, the screen frame. Neither can the stretching of the screening member on the frame cause damage to the screen cloth. Moreover, the continuous nature of the connection between the members 24 and the screen cloth insures that all the Wires of the screen cloth shall be stretched equally,

. and that the screen cloth shall lie fiat and free from pockets. It will be noted further,

that the construction of the screening member is exceedingly simpleA and c eap, and that the inclusion of the fabric strips at the junction between the screen cloth and the members 24 prevents damage to the screen cloth, both in putting the screening member to ether and in the use of the device.

ile I have described my invention as including a particular construction of screen frame, other constructions of frame may be used, such, for instance, as one of the en eral construction disclosed in the co-pen ing application of Willard J. Bell, Serial No. 129,333, filed November 9, 1916.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. In a screening device, a screening member comprising a substantially rectangular frame, and a 'screen-cloth detachably mounted thereon, the side edge of. said screencloth .being crimped over a suitable fabric gripping member, a substantially S-shaped .attaching member having its one end crimped over said crimped portion of said screen cloth and said fabric gripping mem- 9.

ber, and having its other end engaging the side bars of said frame.

2. In a screening device, a screening member comprising a substantially rectangular frame, composed of side and end bars, a screen-cloth detachably mounted thereon, said cloth having its side edge crimped over a fabric gripping member, and further bent upon itself forming a portion hook-shaped in cross section, and reinforcing and attaching members substantially S-shaped in cross section, said reinforcing members having their one edge secured to said hookshaped portions of said screen-cloth and their other edges secured to said frame.

3. In a screening device, a screening member comprising a substantially rectangular adjustable frame, and a screen-cloth de tachably mounted thereon, the side edges of said screen-cloth being crimped over a suitable fabric gripping member, a substantially S-shaped attaching member having its one end crimped over said crimped ortion of said screen-cloth and said fa ric gripping member, and having its other end engaging the side bars of said frame, and means for expanding said frame to tighten said screen cloth.

4. In combination with an adjustable frame of a screening member, a screen cloth detachably secured thereto, said cloth having two of its edges bent hook-shaped, and reinforcing members substantially S-shaped in cross section secured in said hook-sha ed portion of said screen cloth and engaging said frame, substantially as described.

5. In combination with an adjustable frame 0f a screening member, a, Screen cloth detachably secured thereto, fabric'grlpp g ERICK STUART CURTIS, have hereunto set my members secured to two of the edges of said hand.

screen cloth, and reinforcing members secured to said screen cloth and said fabric FREDERICK STUART CURTIS' 5 gripping members and having their other Witnesses:

edge detaehably secured to said frame. GUY A. DIsBRo,

In testimony whereof, I, the said FRED- HUGH E. BROWN. 

